题目1.1 :显示"welcome to python "
答案:print('welcome to python')
题目1.2:显示"welcome to python " 五次
答案:print ("welcome to python\n") * 5 #\n表示换行,要是没有\n的话就会连接在一起
题目1.3:编写fun,其中fun是分别有fun组成。
答案:#注意,"N","N"和”NN"长度不一致
print ("F"*7," "*3,"U"," "*5,"U"," "*3,"N"*2," "*4,"N"*2)
print ("F"*2," "*4," "*3,"U"," "*5,"U"," "*3,"N"*3," "*3,"N"*2)
print ("F"*7," "*3,"U"," "*5,"U"," "*3,"N"*2,"","N"*1," "*1,"N"*2)
print ("F"*2," "*4," "*3,"","U"," "*3,"U"," "*4,"N"*2," "*2,"N","N"*2)
print ("F"*2," "*4," "*5,""*3,"U"*3," "*2," "*3,"N"*2," "*3,"N"*3)
题目1.4:编写程序显示下面的表格(类似矩阵)
答案:#二位数和两位数的长度不一样,要根据数据的长度调整空格的长度
value= [1,2,3,4]
print ("a", " "*2, "a^2"," "*2,"a^3"," "*4,)
print ("1", " "*2, "1"," "*5,"1"," "*4)
print ("3", " "*2, "9"," "*5,"27"," "*4)
print ("4", " "*2, "16"," "*4,"64"," "*4)
题目:1.5编写程序显示下面表达式的结果:(9.5*4.5-2.5*3)/(45.5-3.5)
答案:print((9.5*4.5-2.5*3)/(45.5-3.5))
要是加上双引号,即:
print("(9.5*4.5-2.5*3)/(45.5-3.5)")
那显示的是这个公式(9.5*4.5-2.5*3)/(45.5-3.5)
题目1.6 :级数求和,编写程序显示1+2+3+4+5+6+7+8+9的和
答案: #for之后那一列(可能是几列)要缩进
sum = 0
for i in range(10)
sum+=i
print ( sum)
题目1.7 :(近似Π)可以使用下面的公式计算Π=4*(1-1/3+1/5-1/7+1/9-1/11+...),编写程序显示4*(1-1/3+1/5-1/7+1/9-1/11)和4*(1-1/3+1/5-1/7+1/9-1/11+1/13-1/15)
答案:#**表示次方
程序1:
pi = 0.0
for i in range(1,6):
pi += 4*(((-1)**(i+1))/(2*i-1))
print (pi)
程序2:
pi = 0.0
for i in range(1,8):
pi += 4*(((-1)**(i+1))/(2*i-1))
print (pi)
1.8
显示r=5.5的圆的面积和周长。
1.9;1.10;1.11不会
1.12
程序:#求更加简单的分享
import turtle
turtle.forward(100)
turtle.right(90)
turtle.forward(100)
turtle.right(90)
turtle.forward(200)
turtle.right(90)
turtle.forward(200)
turtle.right(90)
turtle.forward(200)
turtle.right(90)
turtle.forward(100)
turtle.right(90)
turtle.forward(200)
turtle.left(90)
turtle.forward(100)
turtle.left(90)
turtle.forward(100)
turtle.left(90)
turtle.forward(200)
turtle.left(180)
turtle.forward(100)
程序2:
import turtle
turtle.penup()
turtle.goto(-50,0)
turtle.pendown()
turtle.forward(100)
turtle.penup()
turtle.goto(0,50)
turtle.right(90)
turtle.pendown()
turtle.forward(100)
程序3:#注意转折处的角度
import turtle
turtle.right(60)
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
程序4:
import turtle
turtle.right(60)
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
turtle.right(120)
turtle.forward(200)
turtle.left(120)
turtle.forward(100)
turtle.left(120)
turtle.forward(100)
好无聊,改天再画